Lithium disilicate glass ceramics, method for the production thereof and use thereof

A technology of glass ceramics and lithium disilicate, applied in pharmaceutical formulations, photometry using electric radiation detectors, dental preparations, etc., to achieve high strength values ​​and improve chemical stability

Active Publication Date: 2012-10-17
FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] All known lithium disilicate glass-ceramics exhibit deficiencies: in their handling i

Method used

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  • Lithium disilicate glass ceramics, method for the production thereof and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1- Embodiment 6

[0029] In Examples 1-6, glass compositions with high zirconia content are shown, which are transformed by a two-step temperature treatment: first into an easily machined lithium metasilicate glass-ceramic; subsequently Transforms into a highly translucent, very strong and chemically stable lithium disilicate glass-ceramic.

[0030] In Table 1 the compositions and their components are shown.

[0031] Table 1

[0032]

B1

B2

B3

B4

B5

B6

SiO 2

66.9

65.8

65.5

63.7

63.5

63.5

Li 2 o

13.9

13.7

13.6

13.2

14.4

12.9

ZrO 2

10.0

10.0

12.0

11.7

12.7

13.5

Al 2 o 3

3.2

3.1

3.1

3.0

3.3

3.5

P 2 o 5

3.0

3.0

3.0

2.9

3.1

3.4

K 2 o

2.9

2.9

2.9

2.8

3.0

3.2

CeO 2

-

1...

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Abstract

The invention relates to glass ceramics on the basis of the lithium disilicate system, which can be easily mechanically machined in an intermediate stage of the crystallization and which represent high-strength, highly translucent and chemically stable glass ceramics after complete crystallization. Furthermore, the invention relates to a method for producing said glass ceramics. The glass ceramics according to the invention are used as dental material.

Description

technical field [0001] The present invention relates to a glass-ceramic based on a lithium disilicate system which is easily machined in an intermediate crystallization step and which, after complete crystallization, behaves as a high-strength, highly translucent and chemically stable glass-ceramic. Furthermore, the invention also relates to a method for producing said glass ceramics. The glass ceramics according to the invention are used as dental materials. Background technique [0002] The lithium disilicate glass-ceramics known from the literature and some patents are based on this glass-ceramic system. Thus, for example, in EP-B-536479 a self-glazed (self-glazed) lithium disilicate glass-ceramic body for the production of tableware is described, and in EP-B-536572 it is described Lithium disilicate glass-ceramics used as building lining units for stained glass. [0003] Lithium disilicate glass-ceramics for which patents have been granted are mainly focused on dental...

Claims

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Application Information

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IPC IPC(8): C03C10/00A61C13/00C03B32/02C04B41/00A61C5/35A61C5/70A61C5/77
CPCC03C10/0027A61C13/083A61K6/0245A61K6/0273C03B32/02A61C5/08A61K6/024A61C5/35A61C5/70A61C5/77C03C3/097C03C4/0021G01J1/44A61K6/82A61K6/816A61K6/824A61K6/822A61K6/833A61K6/78A61K6/818C03C10/00A61C13/00C04B41/00A61C13/0006A61C13/01
Inventor 伯恩哈德·杜莎昂约恩·普罗布斯特诺贝特·蒂尔约阿希姆·比布斯马库斯·福尔曼尤多·许塞尔
Owner FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
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